我已经使用Intent在我的活动的ImageView中选择了SD卡中的图像。现在我想显示一个固定大小的移动矩形,即我们必须使用手势和我们想要的图像的任何部分,然后我们能够我们能做到这一点吗?对我来说真的很难吗? 请帮帮我这样做?
更新 - >我已经能够使用矩形,我在裁剪和保存选定的部分时遇到问题。如何做到这一点?
答案 0 :(得分:7)
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra("crop","true");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempFile());
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(photoPickerIntent, 1);
}
private Uri getTempFile() {
if (isSDCARDMounted()) {
String f;
muri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
"apple_" + String.valueOf(System.currentTimeMillis()) + ".jpg"));
//File f = new File(Environment.getExternalStorageDirectory(),"titus1.jpg");
try {
f=muri.getPath();
} catch (Exception e) {
}
return muri;
} else {
return null;
}
}
private boolean isSDCARDMounted(){
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED))
return true;
return false;
}
protected void onActivityResult(int requestCode, int resultCode,
Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case 1:
if (resultCode == RESULT_OK) {
String filePath= muri.getPath();
Log.e("path", "filePath");
Toast.makeText(this, filePath, Toast.LENGTH_LONG).show();
Bitmap selectedImage = BitmapFactory.decodeFile(filePath);
image = (ImageView)findViewById(R.id.image);
image.setImageBitmap(selectedImage);
}
}
}
答案 1 :(得分:1)
此博客文章解释了select and crop image in android,希望它有所帮助。